[Solved] Pointer stored in int

Question

pbParamInfo – Pointer to a null-terminated string of bytes specifying the types of the parameters following pbParamInfo.

… – Variable list of parameters, of types specified in pbParamInfo.

You are passing NULL for pbParamInfo, which I assume means that no data will be stored in the returned variant, so of course the pointer is invalid.

If you follow the documentation further, you find that passing VTS_BSTR specifies that you can initialize the variant with a pointer-to-char (pass that as the next argument after pbParamInfo).

Accepted Answer

From the documentation

pbParamInfo – Pointer to a null-terminated string of bytes specifying the types of the parameters following pbParamInfo.

… – Variable list of parameters, of types specified in pbParamInfo.

You are passing NULL for pbParamInfo, which I assume means that no data will be stored in the returned variant, so of course the pointer is invalid.

If you follow the documentation further, you find that passing VTS_BSTR specifies that you can initialize the variant with a pointer-to-char (pass that as the next argument after pbParamInfo).